Guigo I also known as Guigues du Chastel, Guigo de Castro and Guigo of Saint-Romain, he was a Carthusian monk and the 5th Prior of La Grande Chartreuse monastery (The Motherhouse of the Carthusian Order) in the 12th century. He was born in 1083 near the Chateau of Saint-Romain, and entered La Grande Chartreuse in 1106.
Still a young man, his abilities led him to be elected prior in 1109 (aged 26). It was during his his time as Prior and Father General of the Order that the original community slowly began to expand. Guigo was called on to compose the first Customs (Consuetudines) of the new Eremitic Order sometime between 1121 and 1128.
Translated from the Latin into English by Fr. Ugo-Maria GinexErem. Dioc., Prior of St. Mary’s Hermitage Nr. Canterbury Kent, a Hermit of Saint Bruno who has used this version of the Consuetudines as his Rule of Life since 1995.